britskii, Gymnorhamphichthys Carvalho [T. P.], Ramos [C. S.] & Albert [J. S.] 2011:401, Figs. 1, 3A [Copeia 2011 (no. 3); ref. 31553] Córrego Embaúba, tributary to Río Cuiabá, 14°55'S, 56°27'W, Rosário Oeste, Mato Grosso, Brazil. Holotype: MZUSP 106814. Paratypes: many at FMNH, MCP, MUSM, MZUSP, NUP, UFRGS. Plus non-type specimens. Type catalog: Ferraris et al. 2017:[26] [ref. 35236], Oliveira et al. 2022:10 [ref. 39255]. •Valid as Gymnorhamphichthys britskii Carvalho, Ramos & Albert 2011 -- (Koerber 2014:10 [ref. 33621], Mirande & Koerber 2015:47 [ref. 35117], Ferraris et al. 2017:[26] [ref. 35236], Koerber et al. 2017:69 [ref. 35267], Reis et al. 2020:463 [ref. 38364]). Current status: Valid as Gymnorhamphichthys britskii Carvalho, Ramos & Albert 2011. Rhamphichthyidae. Distribution: South America: Rio de La Plata system (Argentina, Brazil and Paraguay). Habitat: freshwater.